ROTHENBERGER ROTEST GW 150/4 - Manual (Page 13)

ENGLISH 11
3 Technical data
Accuracy manometer 0.1 bar (display range 0 - 4 bar) water column with
a reading accuracy of 0.1 mbar pursuant to 1*
Filling water tank The ROTEST GW 150/4 is supplied with a full water tank (2).
Should the tank need refilling, see fig. B.
Do not use distilled water or water with any additives, such as alcohol, spirits or any
other similar substances! Additives will change the surface tension of the liquid used
and adulterate test readings! Do not use the ROTEST GW 150/4 in an environment
under 0°C (32°F)! Using the instrument in frozen or freezing environments may cause
damage to the water tank, the cut-off valves and the couplings.
ROTHENBERGER cannot and will not accept any warranty claims arising from
negligence or failure to adhere to these instructions.
4 Built-in safety tests
Carry out the safety tests integrated in the ROTEST GW 150/4 before commissioning the
instrument and in regular intervals. Ensure that the instrument is functions properly before use.
4.1 Built-in hand pump (3) and connecting hose (6) test
 Close all cut-off valves on your ROTEST 150/4.
 Insert connecting hose (6) to connecting valve A. An auditable sound is heard when hose
and valve nipple are properly locked.
 Use hand pump to increase system pressure to 3 bar.
 Wait 10 minutes for loaded air and water temperatures to equalize.
Prolong period of temperature equalization if temperatures fluctuate greatly!
 Carry out test over a period of ten minutes. The indicated pressure should not drop over a 10-
minute period.
4.2 Built-in bellow (12), water column and connecting hose (6) test
 Close all cut-off valves on your ROTEST GW 150/4.
 Insert connecting hose (6) to connecting valve B. An auditable sound is heard when hose
and valve nipple are properly locked.
 Assemble tube element system as follows:
- while carefully turning insert tube element (8) with scale 41-75mbar into fixed tube
element (7).
- while carefully turning insert tube element (9) with scale 81-115mbar into tube element (8)
 Open connecting valves B,C and D.
 Use bellow (12) to load a pressure of 110 mbar into the test system.
 Close connecting valve C to avoid a loss in pressure.
 Wait 10 minutes for loaded air and water temperatures to equalize.
Prolong period of temperature equalization if temperatures fluctuate greatly!
 Carry out test over a period of ten minutes. The indicated pressure should not drop over a 10-
minute period.
1* Statutory regulations in the country of use or the respective manufacturer and facility instructions and guidelines